beautiful photos folks, I'm jealous in more ways than one.... the iPhone has always exceeded in taking great pictures for a phone, and its photo stitcher app is excellent. As your photos here show.
Now I love my Android phone, and it does take excellent photos for a phone. But I was dissapointed to find only one app that stitched photos into panoramics, and at that it did not excel on my first attempt.
Behold a panoramic of the Deschutes trail taken just today in the heat of the day, using the PanoStitch app:

notice the very obvious seam right down the middle. The settings on this app are super basic so it may be because of the individual photos regardless of the app.... My question to you iPhone users is: does sometimes the stitching process fail or give obvious seams?
The best I can do on an Android is take the pano stitching process off the phone and onto a real computer using Hugin software which always does an excellent job. Here, a photo from last years adventure to Mt Washington taken from my phone processed later with Hugin

lightweight, cheap, strong... pick 2